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Finding the Fourth Proportional to 72,571.85, 108,864.64 and 28,202.02

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Solution

The fourth proportional to 72,571.85, 108,864.64 and 28,202.02 is: 42,305.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,571.85 : 108,864.64 = 28,202.02 : x
  2. Step 2: Convert to fraction form
    72,571.85/108,864.64 = 28,202.02/x
  3. Step 3: Cross multiply
    72,571.85x = 108,864.64 × 28,202.02
  4. Step 4: Simplify right side
    72,571.85x = 3,070,202,754.57
  5. Step 5: Solve for x
    x = 3,070,202,754.57/72,571.85
  6. Step 6: Final answer
    x = 42,305.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.